Valve



Feb. 16 1926. 1,573,074

c. w. LARNER VALVE Filed Dec. 8, 1921 Patented Feb.` 16, 1926.

UNITED STATES PATENT OFFICE;

CHESTER W. LARNER, F PHILADELPHIA, PENNSYLVANIA, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, TO THE WILLIAM CRAMP & SONSl SHIP & ENGINE BUILDING COMPANY, A CORPORATION 0F PENNSYLVANIA.

VALVE.4

Application lled December 8, 1921. Serial No. 521,059.

To all uihom t may concern:

Be it known that I, CHEsrER 1V. LARNER, a citizen of the United States, residing at Philadelphia, in the county of Philadel-rr` 5 phia and State of Pennsylvania, have in- ,k vented certain `new and useful Improvements in Valves, of which the following is a specification. A

Thepresent invention relates to cylinder and plunger valves opened and closed prin- 'cipally by the pressure of the fluid which flows through them. A

Objects of the invention are first to provide for opening the valve under relatively low head and when arranged in vertical position and adapted to close downward; second, -to provide improved means for opening and closing such a valve when arranged in any position; third, to provide for reducing the dead weight of the valve when in vertical position so that comparatively low upward pressure will satisfactorily open it, and fourth, to provide an improved valve of the general type recited.

The invention will be claimed at the end hereof, but will be first described in connection with the embodiments of it selected from other embodiments for the sake of illustration in the accompanying drawings, forming part hereof, andin which:

Fig. 1 is a vertical sectional view of a valve embodying the invention.

In the drawings 1, is a seat structure. 2,

is a cylinder element' spaced from the seat vstructure as by means of radial ribs 3, to -provide a fluid way. The head 4, of the cylinder is closed. 16 is a plunger element having a pointed nose co-operating with the seat structure 1, to open and close the fluid way of the valve.

The plunger element 16 is formed with a differential portion providing an annular chamber A between the casing 1 and piston 22 for lifting pressure entering by leakage or through the ports 27. The pressure in the inner chamber is vcontrolledv by valve 19 and exhaust port 18 in the nose of the lunger, the pressure being sufpplied to this inner chamber by leakage l bearin 23 around stem 20 of yalve 19. To close t e plunger stern 20 and'valve 19 are 'lowered by any desired means such as arack and pinion to close or restrict port 18 and i.,

or instance through' sufiicient to overcome the pressure in annular` chamber A. The plunger element 16 will follow closely the movement of the valve 19A for any tendency to overrun the downward movement of the valve will be checked by the resultant automatic opening of the port .18 and corresponding reduction in pressure in the inner chamber. Similarly in opening a permanent upward pressure tending to float the valve is afforded by annular chamber A and the interior pressure is reduced by lifting valve 19 and increasing the opening through the port 18. f A The plunger element 16 thus tends to float open and is moved and held in any desired position by` \fcontrol of the downward or closing pressure which is`normally-exertcd without mechanical effort and simply by adj ustment of the valve 19 to vary the rate of the exhaust discharge through opening 18. In addition to moving plunger 1G by means of the hydraulic pressure .exerted upon it, plunger 16, may be moved mechanically by valve 19 pushing against its seat in the plunger element.

I claim :e-

kIn a hydraulic valve structure the combination with the vertical wall of a fluid Way -gradually tapering downward to form -a valve seat, of a fixed cylinder supported from said wall, a vertically movable valve plunger sliding in said cylinder and having a piston portion between an inner chamber and a surrounding lannular chamber A within the cylinderand a n'ose portion subjected to the vfloating action of vertically upward fluid-way pressure andv tapered to form a smoothly contracting annular passage with the fluid waygwall and provide a region of permanently low pressure adjacent the'end of said plunger, and .means for reducing the 'CHESTER W. Laarne.

,'05 interior pressure above the plunger' to float 

